Comparative Analysis: Vacuum Insulated Glass vs. Traditional Double Glazing

1. Thermal Performance Comparison

Vacuum Insulated Glass (VIG):

• Achieves U-values as low as 0.4 W/(m²·K) , outperforming traditional double glazing (typically 1.0–2.8 W/(m²·K)).

• Utilizes a vacuum-sealed gap (≤0.2 mm) to eliminate convective heat transfer, critical for meeting stringent standards like China’s GB/T51350-2019 and the EU’s EPBD III .

Traditional Double Glazing:

• Relies on inert gas (argon/krypton) filling and wider spacers (12–24 mm).

• Suffers from gradual gas leakage, reducing U-value efficiency by 15–20% over 10 years.

2. Structural & Acoustic Advantages

Thickness & Weight:

• VIG panels are 60% thinner (total thickness: 6–8 mm vs. 24–36 mm for double glazing), enabling retrofitting in heritage buildings .

• Weight reduction (≤20 kg/m²) minimizes structural reinforcement needs.

Noise Reduction:

• VIG achieves 42 dB sound insulation due to vacuum layer damping, surpassing double glazing’s 35 dB.

3. Cost-Benefit Analysis

Initial Costs:

• VIG costs ~$75/m² (2025 projection), 2.5× higher than standard double glazing. However, Chinese suppliers like Jinan Evergreen Glass have reduced production costs by 58% since 2015 through advanced laser sealing .

Lifetime Savings:

• Energy savings offset VIG’s premium within 7–10 years in cold climates.

• Maintenance costs drop by 30% as VIG avoids spacer degradation and gas replenishment.

  
  

4. Supplier Capabilities & Certifications

Leading vacuum insulated glass suppliers differentiate through:

• Production Scale: Chinese manufacturers (e.g., Beijing Xinliji) contribute 75% of global VIG capacity, ensuring 4-week lead times for bulk orders .

• Certifications: ISO 9001, CE, and ASTM E2190 compliance are mandatory for EU/US market entry.

• Customization: Suppliers now offer tempered VIG-laminated composites with 19J impact resistance for safety-critical applications .

5. Market Adoption Barriers

• Fragility Concerns: VIG’s edge-sealing remains vulnerable during transport; suppliers mitigate this with non-symmetric stress-balance packaging .

• Skill Gaps: 68% of installers lack vacuum glass handling training, increasing breakage risks.

Conclusion

Vacuum insulated glass suppliers are driving a paradigm shift in building glazing. While VIG’s upfront costs remain higher, its superior thermal performance and lifespan ROI make it indispensable for zero-energy projects. Strategic partnerships with certified suppliers (prioritizing ISO/CE compliance and ESG alignment) will be critical for architects and developers navigating 2025 carbon tariff regulations.

For technical specifications or supplier shortlists, consult info@evergreenglass.com .